Author: Tord Romstad
Date: 04:22:58 05/05/04
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On May 04, 2004 at 16:46:14, Dieter Buerssner wrote: >On May 04, 2004 at 10:44:43, Tord Romstad wrote: > >>When there is little thinking time left, my engine annoyingly often fails to win >>KQKR endgames. > >Does it really happen often? Rarely enough that it probably doesn't have any measurable effect on the playing strength, but often enough to make me angry and annoyed. It is extremely painful when it happens. With enough time left on the clock, my engine is able to win the endgame, but I sometimes test at absurdly fast time controls (like 15 seconds/game). >I cannot remember to have seen this endgame in >enginematches. Of course, I will have forgotten, but it may indicate, that it >does not happen often (or that typically both opponents have TBs, and resigned >long before). > >>Are there any simple but effective eval tricks which can help to >>play such endgames well without searching very deeply? > >Ernst A. Heinz suggests (w = Q/winning side, l = losing side) > >score = 400 + 1/8 * dist(K_l,R) - 1/8 * edge_dist(K_l) > - 1/8 * corner_dist(K_l) - 1/8 * dist(K_l, K_w) Thanks! I will experiment with something similar than that. If the formula is really effective, I think a constant bigger than 400 would be a good idea, though. Tord
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